![]() ![]() The secret to this tower’s high-level mobility comes not only from painstaking programming efforts, but also from the impressive gearbox design that dramatically increases the inexpensive SG90’s servo torque as well as agility. However, the sheer compactness and quality of the kinematics sell the illusion better than more complex attempts in the past, such as Ytec 3D stab into the portal tower. Sentry Turret simulates firing using a clever arrangement of servos, LED lights, a built-in MP3 auxiliary panel to recreate recoil, muzzle flash and clever firing pin. The project uses off-the-shelf components, such as the Arduino WeMos D1 Mini 3 Wi-Fi development board (some other ESP32 game projects) along with an ADXL 345 accelerometer and a PIR motion sensor, allowing the turret to operate simulating a killer rampage when motion is detected. Tower It might not fire live ammunition, but it nonetheless incorporates the trademark IKEA-esque design and underhanded voiceover designed to draw unsuspecting test subjects into the line of fire. Joran de Raaff takes on the Aperture Science Sentry. Secret Sauce: A clever gearbox to impress mobility Moreover, you can do it at home thanks to the comprehensive and painstaking documentation. And Dutch video game developer Joran de Raaff’s version of Portal Turret might be the best yet. Check out the video below of the gun in action.Valve’s 2007 puzzle platformer portal and its 2011 sequel may be more than a decade old, but game makers and embedded systems enthusiasts continue to recreate the devious killer robots from the franchise to this day. What do you think about this automated gun? Discuss in the 3D Printed Rubber Band Sentry Gun forum thread on. All in all, this is quite the creation for a young man who has only owned a 3D printer for about 2 years. Other than the 12 3D printed parts, which Thomas has made available on Thingiverse for anyone to download, the gun requires several nuts and screws, a threaded bar, a skateboard ball bearing, 30 cm of string, several pieces of metal pipe, and the various electronics mentioned above. The gun, if made correctly, has a shooting range of about 5 meters, and its design was inspired by a sentry turret seen in the Portal 2 video game. The 3D printed gun was designed by Thomas using Cubify Invent, over a period of three days, and then the parts were 3D printed on his bq Witbox printer using PLA filament. ![]() Thomas used a software package created by Project Sentry Gun in order to control his creation. It allows the gun to easily find and shoot any moving target, all by itself. “I used an Arduino Mega and for the motion the sentry uses two servo motors, one micro servo 180° for the tilt (y-axis) and a normal one for the pan (x-axis). “The ‘Automatic Rubber Band Blaster’ gave me the inspiration to design something similar but automated,” Thomas tells. Thomas has, for a long time, desired to create something of this magnitude, but it wasn’t until he saw a design on Thingiverse for an Automatic Rubber Band Blaster that the light bulb went off in his head. The model he created is capable of shooting 24 rubber bands in succession, although he tells us that it can easily be adapted with a larger barrel to fire up to 30. Thomas, however, elected to use this model to create a fully functional rubber band version of the gun. This certainly is the case with the 3D printed Rubber Band Sentry Gun, created by a 20-year-old student from Bienne, Switzerland, named Kevin Thomas.įor those of you who are unaware, a sentry gun is a firearm that can sense targets and then fire upon them. It seems as though each and every rendition of these toy guns is a little bit more intricate and functional than the last. Here at, we’ve covered our fair share of 3D printed rubber band guns over the course of the past couple of years. ![]()
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